Blue Sea Mini oled meters

Monitors essential electrical system parameters on a bright, waterproof, daylight readable OLED screen
Compact size enables mounting in any convenient location
Reverse polarity protected
Mounts in a common 1-1/8 in hole
Convenient temperature monitoring
Temperatures range from -40°C to 125°C (-40°F to 250°F)
Measures in Fahrenheit or Celsius